Question

State the consequences that can lead to a short circuit. 

One of the major cause of fire in office building is short circuiting. List three factors which may lead to the short circuit.

Answer 1

 It occurs as a consequence of

• failure of electrical insulation’s due to which live wire comes in direct contact with neutral or earth wire. 
• presence of external conducting material such as water which is introduced accidentally into the circuit.
• electrical appliances are forced to operate when its moving parts are jammed.
• connection of current carrying parts of electrical equipment’s comes in contact to one another due to human or natural cause and 
• use of less rating wires. When this happens, there is an excessive electric current which can damage the circuit and may also cause electrical fires.